Is Mater dei convent school in Delhi a good school?

There's no widely known school called "Mater Dei Convent School" in Delhi. There are several Mater Dei schools in India, but they're typically located in different cities. To get an accurate assessment, you'll need to specify the *exact* location of the school you're asking about within Delhi. Once you provide a more precise name and location, I can try to find information on its reputation and quality.